Hammer



FIG. 1 is a perspective view of a hammer showing my new design;

FIG. 2 is an end elevational view thereof;

FIG. 3 is an elevational view thereof opposite to the end shown in FIG. 2;

FIG. 4 is a side elevational view thereof, the opposite side elevational view being identical thereto;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a hammer, as shown and described. 